I have a route handler in express.js and inside it, I am calling an asynchronous function which should return me some value. I am using bluebird promises to handle the promises. Below is a sample code.
router.js
---------
router.post('/endpoint', (req, res) => {
return Promise.try(() => serviceFile.validate())
.then(() => {
console.log('Response: ', response);
})
.catch((error) => {
console.log('Error: ', error) // TypeError: expecting a function but got [object Promise]
})
})
serviceFile.js
--------------
async function validate() {
return Promise.try(() => axios.post('/endpoint'))
.then((response) => response.data)
.catch((error) => {
console.log('Error: ', error.response.data) // successfully printing the error data object
throw error;
})
}
When I call the validate() in the Service.js file, it fails the request (which I want) and successfully prints the error. But I don't want to handle the error here, so I re-throw it and expects to handle it in the router.js file. But in the router.js file, I am getting error as undefined and it says, TypeError: expecting a function but got [object Promise]
I am not getting any clue where I am doing wrong. Any help would be greatly appreciated.
its sort of unclear what serviceFile.validate does unless thats the second function you listed, this might be a more clear way of using promises
router.post('/endpoint', async (req, res) => {
try {
const response = await serviceFile.validate()
console.log('Response: ', response);
} catch (err) {
console.log('Error: ', error)
}
})
function validate () {
return new Promise(async (resolve, reject) => {
try {
const res = await axios.post('/endpoint')
resolve(res.data)
} catch (err) {
if (err.response && err.response.data) {
reject(err.response.data)
} else {
reject(err)
}
}
})
}